Subject 29 · Medical Physics

Medical Physics

Every imaging machine in a hospital is one physics idea wearing a lab coat. X-rays photograph a shadow through exponential attenuation; CT spins that shadow into slices; ultrasound listens for echoes and reads depth from d = vt/2; nuclear medicine and PET follow a radioactive tracer to image function instead of anatomy; MRI resonates the protons you are mostly made of. The chapter ends with the calculus underneath — attenuation as a differential equation, half-value thickness, and effective half-life. Every subsection includes a responsive interactive model.